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[Qemu-devel] [PATCH 09/36] hw/pci/pcie_aer.c: fix buffer overruns on inv
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 09/36] hw/pci/pcie_aer.c: fix buffer overruns on invalid state load |
Date: |
Mon, 5 May 2014 22:30:07 +0200 |
From: "Michael S. Tsirkin" <address@hidden>
4) CVE-2013-4529
hw/pci/pcie_aer.c pcie aer log can overrun the buffer if log_num is
too large
There are two issues in this file:
1. log_max from remote can be larger than on local
then buffer will overrun with data coming from state file.
2. log_num can be larger then we get data corruption
again with an overflow but not adversary controlled.
Fix both issues.
Reported-by: Anthony Liguori <address@hidden>
Reported-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
hw/pci/pcie_aer.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c
index 991502e..535be2c 100644
--- a/hw/pci/pcie_aer.c
+++ b/hw/pci/pcie_aer.c
@@ -795,6 +795,13 @@ static const VMStateDescription vmstate_pcie_aer_err = {
}
};
+static bool pcie_aer_state_log_num_valid(void *opaque, int version_id)
+{
+ PCIEAERLog *s = opaque;
+
+ return s->log_num <= s->log_max;
+}
+
const VMStateDescription vmstate_pcie_aer_log = {
.name = "PCIE_AER_ERROR_LOG",
.version_id = 1,
@@ -802,7 +809,8 @@ const VMStateDescription vmstate_pcie_aer_log = {
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT16(log_num, PCIEAERLog),
- VMSTATE_UINT16(log_max, PCIEAERLog),
+ VMSTATE_UINT16_EQUAL(log_max, PCIEAERLog),
+ VMSTATE_VALIDATE("log_num <= log_max", pcie_aer_state_log_num_valid),
VMSTATE_STRUCT_VARRAY_POINTER_UINT16(log, PCIEAERLog, log_num,
vmstate_pcie_aer_err, PCIEAERErr),
VMSTATE_END_OF_LIST()
--
1.9.0
- [Qemu-devel] [PULL 00/36] migration queue, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 05/36] virtio-net: out-of-bounds buffer write on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 07/36] ahci: fix buffer overrun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 04/36] virtio-net: fix buffer overflow on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 03/36] vmstate: add VMSTATE_VALIDATE, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 01/36] vmstate: reduce code duplication, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 06/36] virtio: out-of-bounds buffer write on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 08/36] hpet: fix buffer overrun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 09/36] hw/pci/pcie_aer.c: fix buffer overruns on invalid state load,
Juan Quintela <=
- [Qemu-devel] [PATCH 10/36] pl022: fix buffer overun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 11/36] vmstate: fix buffer overflow in target-arm/machine.c, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 12/36] virtio: avoid buffer overrun on incoming migration, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 14/36] pxa2xx: avoid buffer overrun on incoming migration, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 13/36] virtio: validate num_sg when mapping, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 16/36] tsc210x: fix buffer overrun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 15/36] ssd0323: fix buffer overun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 18/36] virtio-scsi: fix buffer overrun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 17/36] zaurus: fix buffer overrun on invalid state load, Juan Quintela, 2014/05/05
- [Qemu-devel] [PATCH 21/36] savevm: Ignore minimum_version_id_old if there is no load_state_old, Juan Quintela, 2014/05/05